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zeynep's profile
zeynep tufekci
zeynep tufekci
zeynep tufekci
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@zeynep

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zeynep tufekciVerified account

@zeynep

Complex systems, wicked problems. Society, technology, science and more. @UNC professor. @NYTimes columnist. My newsletter is @insight: http://www.theinsight.org 

floating in a most peculiar way
theinsight.org
Joined August 2009

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    1. zeynep tufekci‏Verified account @zeynep 21 Jan 2021

      zeynep tufekci Retweeted Charlie Warzel

      Question re:K/N95 re-use. We need official/authoritative guidance. Use it carefully and let it sit for a few days in a paper bag or a non-airtight box disinfect (don't wash or heat) and keep using it is my unofficial guidance based on this paper. Anyone? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7724761/ …https://twitter.com/cwarzel/status/1352299319617982465 …

      zeynep tufekci added,

      Charlie WarzelVerified account @cwarzel
      i'm guessing there's some nuance here...like you need to let it rest/disinfect after being in public with it...but is there...a number of uses after which it becomes less effective? i feel like an idiot for not knowing the answer to this 10 months in!
      Show this thread
      37 replies 71 retweets 319 likes
      Show this thread
    2. zeynep tufekci‏Verified account @zeynep 21 Jan 2021

      Needless to say this is for general public (!) not any healthcare setting (!) or anyone doing anything high-risk. Your grocery shopping trip mask. Loss of electrostatic charge doesn't seem to drop filtration much, and sanitize hands before putting on/taking off seems enough.

      15 replies 6 retweets 113 likes
      Show this thread
    3. Megan McArdle‏Verified account @asymmetricinfo 21 Jan 2021
      Replying to @zeynep

      My understanding is that it stops working when the filter gets so clogged it becomes hard to breathe. Presuming you haven't washed it, or whatever. There were also studies suggesting an oven on warm for 1/2 hour sterilizes pretty well.

      3 replies 0 retweets 2 likes
      zeynep tufekci‏Verified account @zeynep 21 Jan 2021
      Replying to @asymmetricinfo

      I don't think regular people need to sterilize them, to be honest. I'm worried there isn't enough research on the sterilization methods at home. Never had the too-clogged feeling. Presumably there is a limit? I'd like lab-tested guidance.

      9:48 AM - 21 Jan 2021
      • 8 Likes
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      5 replies 0 retweets 8 likes
        1. Ryan Moulton‏ @moultano 21 Jan 2021
          Replying to @zeynep @asymmetricinfo

          My guess is that the kind of particle sizes that would actually clog it are orders of magnitude larger than the particles we're worried about. If it gets "clogged" it's clogged by dust.

          0 replies 0 retweets 1 like
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        1. Dak (David A. Keldsen)‏ @d_a_keldsen 21 Jan 2021
          Replying to @zeynep @asymmetricinfo

          *Any* clogging will increase bypass flow around the mask in both directions. Such a mask should be considered contaminated and replaced or cleaned (if possible). Dirty masks are not safe. Seehttps://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-019-4109-x …

          0 replies 1 retweet 2 likes
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        1. Mark Ingram‏ @grmarkam 21 Jan 2021
          Replying to @zeynep @asymmetricinfo

          It has been studied. In Taiwan health officials have instructions on how to do it with a rice cooker (an appliance everyone has there). http://www.taipeitimes.com/News/taiwan/archives/2020/02/15/2003731027 …https://www.youtube.com/watch?v=ogCTP3xCWkM …

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        1. Aaron Stupple‏ @astupple 21 Jan 2021
          Replying to @zeynep @asymmetricinfo

          There is electrostatic charge decay, again unknown over what timeframe (astonishing this hasn’t been established).

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        1. Sergey Volodko‏ @s5volodko 21 Jan 2021
          Replying to @zeynep @asymmetricinfo

          Probably you can reach noticeable clogging only when you use your mask in a very dusty area for a long time.

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